People put a lot of time and effort in to building and maintaining a POB. I've always felt that the Roleplay for them should be a lot heavier to build/destroy.
For example: Players would be required to roleplay the making of the station, as well as those looking to shoot it would need a really justifiable reason in-roleplay to do so. Not simply: Oh, I don't like that, let's shoot it. The fine system some people use, house laws, investigations in to who owns it, upscale those and make them more required than a single RP post. (Not for Nomads, though. We're lucky enough to have figured out a way to be able to do that kind of stuff.)
The other alternative would be to make POBs an SRP thing so they don't spring up out of no where, modify the time required before a siege, modify the hull strength of the station (per level) and limit the amount of ships that could shoot it by Core Level, as well as how the shield mechanic for it works. That way, defenders have a bit of a fair chance of fighting back. Alternatively, don't do anything, and people can stop whining about every single thing in the game being a result of some OORPly motivated action against themselves and acting offended when proven otherwise.